General Description
The Supertex HV850 is a high voltage electroluminescent (EL) Lamp Driver IC. It is designed to drive EL lamps of up to 1.5in2, with capacitive values up to 5.0nF. The HV850 converts a low voltage DC input to a high voltage AC output across an EL lamp. It uses a charge pump scheme to boost the input voltage, eliminating the need for external inductors, diodes, and high voltage capacitors, components commonly found in conventional topologies.

Features
► No external components required when using an external EL clock frequency
► EL frequency can be set by an external resistor
► Low noise
► DC to AC converter
► Drives up to 5.0nF load (approx. 1.5in2 lamp)
► Output voltage regulation
► Enable function
► EL Lamp dimming

Applications
► Cell phone keypads and displays
► Transceivers
► MP3 players
► Watches
► Pagers
► Measuring instruments/gauges